Well-door for elevators.



' N0. 7|4,|53. Patented Nov. 25, |902.

w. A. c oss. WELL D003 FR ELEVATOBS.

(Appication led June 14, 1902.) (No Model.) 2 Sheets-Sheet 2.

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lNITED STATES ATENT OFFICE.

WILLIAM A. CROSS, OF CHICAGO, ILLINOIS.

WELL-GOOR FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 714,153, dated November25, 1902.

Appiimion med Juan, 1902.

To all whom it may concern.:

Be it known that I, WILLIAM A. CRoss, a citizen of the United States ofAmerica, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inWell-Doors for Elevators, of which the following is a specification. v

The present invention relates to that type of vertically-moving well-doors for elevators in which the doors are formed in halves that areoperatively connected together so as to simultaneously move in oppositedirections in the travel of such door halves or sections to open orclose thedoor-openings in the elevator-wells, and has for its object toprovide a simple, durable, and effective construction and arrangement ofparts by means of which a very small space or gap between the thresholdsof the dierent door-openings and the elevator-platform is attained andin consequence of which the usual rapid wear of the adjacent edges ofthe thresholds and of the platform by the constant pounding offreighttrucks over such gaps when of any width is prevented in a greatmeasure and a maximum width of elevator-platform attained. I attain suchobject by the construction and arrangement of parts illustrated in theaccompanying drawings, in which- Figure 1 is a vertical sectionalelevation of an elevator-well and its vertically-moving sectional doorsembodying the present invention, the pair of door sections or halvesbeing shown in a position closing the dooropening of the elevator-well;Fig. 2, a similar view illustrating the pair of door sections 0r halvesin'an opened condition; Fig. 3, a fragmentary sectional elevation atline so 0c, Fig. l; Fig. 4:, a fragmentary elevation of the parts fromthe opposite side to that shown in Fig. 3; Fig. 5, an enlarged detailvertical section at line 0c Figs. 3 and 7, illustrating the lintelportion of the door-opening, the adjacent parts of thedoor-sections,guides, rito., and the meeting ends of the upper landlower door-sections; Fig. 6, a similar section at same line illustratingthe threshold -portion of the door-opening, the adjacent supplementarythreshold, and the adjacent por- Serial No. 111,617. (No model.)

tions of the lower door-section, 85o.; Fig. 7, a detail horizontalsection at line x2 m2, Fig. 2, illustrating the construction of thevertical side guides for the door-sections and the chainand-sheaveconnections betweenthe same.

Similar numerals of reference indicate like parts in the several views.

Heretofore in the class of vertically-moving doors for freight-elevatorwells, to which the present invention belongs and an example of whichmay be found in my prior patent, No. 560,396, of May 19, 1896, thesectional doors Were arranged wholly within the elevator-well, and inconsequence a gap had to be left between the edge of each threshold andthe edge of the elevator-platform to permit of the free movement of suchelevatorplatform. Heretofore such gap has been a serious obstruction tothe free and easy passage of the ordinary freight-trucks off and on theelevator-platform, and, as before stated, the main object of the presentimprovement involves a 'construction in which the size of such gap isreduced in a very material degree and is attained by an arrangement ofparts shown in the accompanying drawings, as follows:

1 represents the wall of the elevator-well, in which the door-openings2at the different iioors of the building are formed.

3 and 4 are the respective upper and lower sections or halves of theseries of doors, which normally close the series of door-openings 2 ofthe building. In the present invention the series of upper sections 3are arranged in vertical alinement one with the other, While the otherseries of lower sections 4 are arranged in similar verticalalineinent ata plane immediately adjacent to thatPef/the series of upper sections.

5 represents a series of supplementary thresholds formed, preferably, ofstructuraliron beams of an I or other suitable forrn, and which supplementary thresholds are arranged in separated relation lo the mainthresholds 6 of the respective door-openings 2, so' as to form a seriesof narrow vertical passages, in which the series of lower door-sections4f are adapted to travel in their vertical movements. In the presentinvention the series of supple- ICO mentary thresholds 5 are arranged invertical alinement and have their upper surfaces on a level Vwith thesurfaces of the main thresholds 6 and constitute track-surfaces forordinary freight-trucks in the movement of the same o or on theelevator-platform.

7 represents horizontal plates secured to the lint-els 8 of therespective door-openings 2 and arranged to project into theelevator-well to constitute stops for the upper door-sections 3 andlimit the upward travel of the same.

9 represents stop-lianges on the lower ends of the upper door-sections3, which when the respective upper and lower door-sections are in aposition to close a particular door-opening rests upon the top of thelower door-section to seal the horizontal joint at themeeting point ofsuch door-sections.

10 represents angle-iron strips secured to the vertical ends of thedoor-sections 3 and 4 to constitute guide-slides for the same in theirmovements.

1l represents vertically-arranged guides secured within theelevator-well and positioned at the sides of the respective dooropenings2 and which are adapted to receive and guide the guide-slides v10 on therespective door-sections. In the particular construction shown in thedrawings such guides comprise an arrangement of parts as follows:

12 is a vertical base plate or strip secured to the wall of theelevator-well and to which strip in turn is secured a narrow verticalstrip or bar 13, which acts as a distance-piece between the base-plate12 and a vertical confining plate or strip 14, the construction beingsuch that a vertical guide-recess 15 is formed for the reception of theguide-slides 10 of the lower door-sections 4.

16 is a distance-piece secured in turn to the confining-plate 14, andupon such distance-piece is secured a narrow vertical strip or bar 17,which, like the strip or bar 13, heretofore described, acts as adistance-piece between the distance-piece 16 and a confiningplate 18,the construction being such that a vertical guide-recess 19 is formedfor the reception and guidance of the guide-slides 10 of the upperdoor-sections 3.

The series of vertical bars or strips above described may be made.continuous and extend the entire height of the elevator-well. It ispreferable, however, to make the same in sections having the requiredlength to properly guide the individual door-sections as affording botheconomy and ease in manufacture.

2O represents sheaves orpulleys secured to the sides of the guides 11,and 21 represents iiexible connections or chains passin g around saidsheaves, with their respective ends secured to the companion upper andlower doorsections of each individual door of the series to afford acounterbalancing connection for such door-sections, as usual in thepresent type of elevator-well doors.

22 represents a portion of the elevator cage or platform.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The combination of an elevator-well having a vertical series ofdoor-openings, aseries of supplementary thresholds arranged in verticalalinement and having a separated relation to the main thresholds of thedoor-openings, and a series of doors formed in sections arranged` tomove vertically7 in opposite directions, the lower series of suchdoor-sections being arranged to travel in the space between such mainand supplementary thresholds, substantially as set forth.

2. The combination of an elevator-well having a vertical series ofdoor-openings, aseries of supplementary thresholds arranged in verticalalinement and having a separated relation to the main thresholds of thedoor-openings, a series of doors formed in sections arranged to movevertically in opposite directions, the lower series of suchdoor-sections being arranged to travel in the space between such mainand supplementary thresholds, and means for imposing simultaneousmovement in opposite directions to each pair of door-sections,substantially as set forth.

3. The combination of an elevator-well having a vertical series ofdoor-openings, a series of supplementary thresholds arranged in verticalalinement and having a separated relation to the main thresholds of thedoor-openings, a series of doors formed in sections arranged to movevertically in opposite directions, the lower series of suchdoor-sections being arranged to travel in the space between such mainand supplementary thresholds, and means for imposing simultaneousmovement in opposite directions to each pair of door-sections, thesamecomprising sheaves or pulleys arranged on the Wall of the well andflexible connections extending around said pulleys and connected attheir respective ends to the respective door-sections, substantially asset forth.

4. The combination of au elevator-well having a vertical series ofdoor-openings, a series of supplementary thresholds arranged in verticalalinement and having a separated relation to the main thresholds of thedoor-openings, a series of doors formed in sections arranged to movevertically in opposite directions, the lower series of suchdoor-sections being arranged to travel in the space between such mainand supplementary thresholds, and stop-plates secured to the lintels ofthe door-openings and adapted to limit the upward movement of the upperseries of doorsections, substantially as set forth.

5. The combination of an elevator-well having a vertical series ofdoor-openings, a series of supplementary thresholds arranged in verticalalinement and having a separated relation to the main thresholds of thedoor-open- IIO ings, a series of doors formed in sections arl movementin opposite directions to each pair Io ranged to move vertically inopposite direcof door-sections, substantially as set forth. tions, thelower series of such door-sections Signed at Chicago, Illinois, this 9thday of being arranged to travel in the space between June, 1902.

such main and supplementary thresholds, stop-plates secured to thelntels of the door- WILLIAM A' CROSS openings and adapted to limit theupward Witnesses:

movement of the upper series of door-sec- ROBERT BURNS,

tions, and means for imposing simultaneous HENRY A. NOTT.

